| 摘要 |
PURPOSE:To avoid an unstable operation in a current control system with a simple structure by controlling the current by considering the phase relationship between the output voltage of an inverter and a system voltage. CONSTITUTION:A DC voltage from a DC power source 1 is supplied to a voltage type self-excited inverter 5 through a smoothing circuit of a chopper 2, a reactor 3 and a capacitor 4. The inverter 5 controls the phase, and produces its output to a power system 9 through a transformer 6, a reactor 7 and a contactor 8. The outputs from a voltage detector 11 and a current detector 12 are applied to a control circuit through a rectifier 14. A power calculator 13 calculates the effective and reactive powers, and applies its output to the control circuit. This control circuit has an effective power regulator and a reactive power regulator, and outputs a control signal of the output voltage phase of the inverter 5 and a control signal of the output voltage peak value of the inverter 5. |
